Finding the Fourth Proportional to 9,523.78, 13,140.50 and 5,542.49

Step by Step Solution

1. Step 1: Write the proportion equation
   9,523.78 : 13,140.50 = 5,542.49 : x
2. Step 2: Convert to fraction form
   9,523.78/13,140.50 = 5,542.49/x
3. Step 3: Cross multiply
   9,523.78x = 13,140.50 × 5,542.49
4. Step 4: Simplify right side
   9,523.78x = 72,831,094.98
5. Step 5: Solve for x
   x = 72,831,094.98/9,523.78
6. Step 6: Final answer
   x = 7,647.29